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Each week we'll be posting several questions from The Official Guide For GMAT® Quantitative Review, 2ND Edition and then after couple of days we'll provide Official Answer (OA) to them along with a slution.

We'll be glad if you participate in development of this project:1. Please provide your solutions to the questions;2. Please vote for the best solutions by pressing Kudos button;3. Please vote for the questions themselves by pressing Kudos button;4. Please share your views on difficulty level of the questions, so that we have most precise evaluation.

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Why do we automatically assume there are parentheses around (3-2k^2)? I didn't assume that so then I didn't distribute the negative on the outside which of course then gave me answer A.

hi soniasawhney.. it does not require any parenthesis as any sign in front of a fraction modifies the entire fraction irrespective of the term..just an example..let the fraction be - \(\frac{7-9}{2}\)..two ways to do it ..first change signs first and then find answer...\(\frac{-7+9}{2}\)=\(\frac{2}{2}\)=1...

second simplify and then change the signs...- \(\frac{7-9}{2}\)=- \(\frac{-2}{2}\)=-(-1)=1..

so both ways answer is same, which means parentheses is not required and a sign in front of a fraction automatically means that the entire fraction is inside bracket....
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Each week we'll be posting several questions from The Official Guide For GMAT® Quantitative Review, 2ND Edition and then after couple of days we'll provide Official Answer (OA) to them along with a slution.

We'll be glad if you participate in development of this project:1. Please provide your solutions to the questions;2. Please vote for the best solutions by pressing Kudos button;3. Please vote for the questions themselves by pressing Kudos button;4. Please share your views on difficulty level of the questions, so that we have most precise evaluation.